All releases of Mozilla Firefox

Release Notes: This release added a sidebars button and support for GStreamer 1.0. Non-whitelisted plugins will no longer be enabled by default. There are also a number of bugfixes, security fixes, and developer-specific changes.

Release Notes: New features include a significant new customization mode, a user-friendly browser control menu, a new tab interface, an interactive onboarding tour, the ability to set up Firefox Sync by creating a Firefox account, a Gamepad API, and a Malay locale. There are also several developer changes and security fixes.

Release Notes: VP9 and Opus video are now supported,
along with horizontal HTML5 audio/video volume control.
There are various new features to HTML forms and MathML,
and several stability issues have been fixed.
In Mac OS X,
there is now Notification Center support for Web notifications.

Release Notes: In Firefox 27.0 you can now run more than one service at a time with Firefox SocialAPI, allowing you to receive notifications, chat, and more from multiple integrated services. TLS 1.1 and TLS 1.2 are enabled by default, and support for the SPDY 3.1 has been added. Web development is made easier with a JavaScript deobfuscator. Besides this, there are several other new features, bugfixes, and security fixes.

Release Notes: All Java plugins are defaulted to "click-to-play". The password manager now supports script-generated password fields. Updates can now be performed by Windows users without write permissions to the Firefox install directory (requires Mozilla Maintenance Service). Support for H.264 on Linux if the appropriate gstreamer plug-ins are installed. Support for MP3 decoding on Windows XP, completing MP3 support across Windows OS versions. Numerous improvements to standards and API compliance, as well as bug and security fixes.

Release Notes: This release adds Web Audio support,
CSS3 background-attachment:local support to control background scrolling,
miscellaneous security fixes,
and many new ES6 functions.
The find bar is no longer shared between tabs.
If you're away from Firefox for months,
you now will be offered the option to reset it to its default
state while preserving your essential information.
Resetting Firefox no longer clears your browsing session.
iframe document content can now be specified inline.

Release Notes: This release supports the new scrollbar style in Mac OS X 10.7 and newer,
implements Close tabs to the right,
adds the ability to tear off chat windows to view them separately by simply dragging them out,
adds accessibility-related improvements to using pinned tabs,
removes support for the Revocation Lists feature,
makes performance improvements to New Tab Page loads,
and adds various developer and security fixes.

Release Notes: Fixes rendering glitches on H.264 video only in FF23 on Vista. Fixes broken spell-checking with non-ASCII characters in the profile path. Fixes audio static/"burble"/breakup in Firefox to Firefox WebRTC calls. Mixed content blocking is enabled to protect users from man-in-the-middle attacks and eavesdroppers on HTTPS pages. An Options panel has been created for Web Developer Toolbox. There are several more changes.